Audio::M4pDecrypt -- DRMS decryption of Apple iTunes style MP4 player files

NAME

Audio::M4pDecrypt -- DRMS decryption of Apple iTunes style MP4 player files

DESCRIPTION


Perl port of the DeDRMS.cs program by Jon Lech Johansen

SYNOPSIS

    use Audio::M4pDecrypt;
    my $outfile = 'mydecodedfile';
    my $deDRMS = new Audio::M4pDecrypt;
    $deDRMS->DeDRMS($mp4file, $outfile);
    See also the M4pDecrypt.pl example program in this distribution.

METHODS

new
my $cs = new Audio::M4pDecrypt;

my $cs_conparam = Audio::M4pDecrypt->new( strHome => '/winroot/Documents and Settings/administrator/Application Data', sPfix => '.', dirSep => '/' );

Optional arguments: strHome is the directory containing the keyfile directory. After running VLC on a .m4p file under Windows, MacOS X, and Linux, this should be found by the module automatically (APPDATA dir under Win32, ~/ under OS X and Linux). sPfix is '.' for MacOS/*nix, nil with Windows. dirSep is the char that separates directories, often /.

DeDRMS
my $cs = new Audio::M4pDecrypt; $cs->DeDRMS('infilename', 'outfilename');

Decode infilename, write to outfilename. Reading slurps up an entire file, so output can overwrite the same file without a problem, we hope. Backup first.

DecryptFile
$cs->DecryptFile('infilename', 'outfilename');

More descriptive alias for the DeDRMS method.

NOTES
    From Jon Lech Johansen:
        DeDRMS requires that you already have the user key file(s) for
        your files. The user key file(s) can be generated by playing
        your files with the VideoLAN Client [1][2].
        DeDRMS does not remove the UserID, name and email address.
        The purpose of DeDRMS is to enable Fair Use, not facilitate
        copyright infringement.
    [1] http://www.videolan.org/vlc/ [videolan.org]
    [2] http://wiki.videolan.org/tiki-read_article.php?articleId=5 [videolan.org]

AUTHOR

    Original C# version: Jon Lech Johansen <jon-vl@nanocrew.net>
    Perl version: William Herrera (wherrera@skylightview.com).

SUPPORT

Questions, feature requests and bug reports should go to wherrera@skylightview.com

COPYRIGHT

 /*****************************************************************************
 * DeDRMS.cs: DeDRMS 0.1
 *****************************************************************************
 * Copyright (C) 2004 Jon Lech Johansen <jon-vl@nanocrew.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

Perl translation with portability modifications Copyright (C) 2004, by William Herrera. Any and all of Perl code modifications of the original also are under GPL copyright.

 Audio::M4pDecrypt -- DRMS decryption of Apple iTunes style MP4 player files